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I have the following two images. I am wanting to warp im1 into the plane of im2, ie. im2 is the target plane.

im1 im2

So, I compute the homography between sparse matching points 

cv::Mat H = cv::findHomography(matPt1, matPt2, CV_RANSAC );
cv::Mat xxim = im1.clone();
cv::warpPerspective(im1, xxim, H, cv::Size(im2.rows, im2.cols) );
imshow( "xxim", xxim );

I had expected to see something like : expected warp

However, I see : enter image description here

I would also like to mention that this code worked fine when I had OpenCV2.2. However recently I upgraded my opencv to 2.4.9 and now it is causing trouble.

mkuse
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  • did your try whether the computed homographies in 2.2 and 2.49 are identical/similar? looks like a broken homography ;) – Micka Oct 09 '14 at 08:42
  • unfortunately, I no more have access to 2.2 now. Still any clue about what could be the possible problem and how to fix it? – mkuse Oct 09 '14 at 11:05
  • wrong/bad features extracted or wrong matches between features. maybe parameter dimensions changed? did you try to display features an matches? – Micka Oct 09 '14 at 11:36

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